Circuit controlling and interrupting apparatus



Oet. 13, 1925. 1,556,640

C. E. SILVER cincun cQN'rRoLLIuG AND IN'IBRRUPTING APPARATUS Filcd Feb.21.1921.

atto: cq

Patented Oct. 13, 1925.

UNITED STATES CLARENCE E. SILVER, OF BLACKWELL, OKLAHOMA.

CIRCUIT CONTROLLING AND INTERRUPTING APPARATUS.

Application filed February To all whom t may concern Be it known that I,CLARENCE E. Srnvnn, a citizen of the United States of America, andresident of Blackwell, in the county of Kay and State of Oklahoma, haveinvented certain new and useful Improvements in Circuit Controlling andInterrupting Apparatus, of which the following is a specification.

This invention relates to circuit controlling and interrupting apparatusfor alternately supplying current to a resistance and for heating, thesaid invention having for its object the provision of novel means forseparating terminals or contacts mechanically, means being provided forpulling the contacts together against the action of the mechanicallyoperating separating device.

A further object of this invention is to produce a circuit controllingmechanism preferably for use in heating machines and particularly foruse in electrically heated machines, the object of the mechanism beingto turn on and to turn olf the electric current automatically for thepurpose of conserving the mechanism or heating elements atleast, of suchmachines. C-ontinuous current in machines of this kind results in aWaste of the current as well as damage to the machine whereas theintermittent current through the electrode proves effective inregulating the degree of heat and in economizing the mechanical parts ofthe device and prevent burning contents.

An object of this invention is to produce `mechanism associated with thepower driven parts of the machine for interrupting or breaking thecircuit and for re-establishing the circuit to attain the objects statedWVith the foregoing and other objects in view, the invention consists inthe details of construction and in the arrangement and combination ofparts to be hereinafter more fully set forth and claimed.

In describing the invention in detail, reference will be had to theaccompanying drawings forming part of this application, wherein likecharacters denote corresponding parts in the several views, and inwhich- Figure 1 illustrates a view in elevation, partly in section andpartly diagrammatic of a controlling mechanism embodying the invention;

Figure 2 illustrates a top plan view thereof;

21, 192.1. serial No. 446,638.

Figure 3 illustrates a detail vieu' of the controlling mechanism; and

Figure 4 illustrates a detail vieuv of the mountingby which the terminalcarrying elements are supported.

In carrying the invention into practice, I employ bre strips 5 and Gwhich are reinforced by the metal strips 7 and 8, which metal strips arepreferably of steel, nickel plated. The strips 5, 6, 7 and S are boundtogether and are connected to a bracket by a screw 9, the said bracketbeing oscillatably mounted on a pivot 10, in order that the plates maybe oscillated as will presently F l appear.

The plates 5, G, 7 and S when in assembled position might be termed anarm, in that they, collectively, constitute a support for the metallichousing 11 which is internally threaded to engage the threads of a bolt12, carrying a contact 13. The liber strips are apertured to receive thehousing, and the metal strips oscillate under the influence of a cam 13amounted on a shaft 15 utilized for dr'ving the mechanism of the heatingmachine so that as the machine is being operated, the sleeve and contactwill be raised and lowered for intermittently estabiishing a circuitthrough the electrodes of the heating machine.

The housing 11 is provided with a flange 11 that forms an abutment forthe loweriuostlibre strip, and the said housing has a nut 16 threaded onit, which engages thc terminal 17 of the conductor 1S, so that the saidterminal is bound against the housing 11 which engages bolt 12 andcurrent may reach the contact 13. The nut also presses the terminal 1Tagainst the uppermost fibre strip and thus the parts are held on thesaid housing. The screw 12 is adjustable in the housing to regulate the.position of the contact 13 with relation to a fixed contact 19, whichlatter Contact extends through insulations 20 and 21 of the member orbracket and is connected to ay terminal 22 of the conductor 23, the saidconductors 18 and 23 being in circuit with a heating electrode 24 whichcircuit has therein a switch 25.

The spring 14 is shown as having its lower end anchored to the bracketand its upper end connected to the fiber strips 5 and 6, so that thesaid fiber strips are pulled normally downward against the action of thecam which lifts them, so that as the shaft 15 rotates and the cam isdisengaged from the arm, the contacts 13 and 19 will engage andestablish a circuit whereas when the cam again strikes the lowermostplate of he arm, it separates the contacts and interni s the circuit.The screw 12 being threa ed to screw in housing 11 makes thisdeviuendjustable in so far as screwing bolt 12 upward allows the saidarm to come nearer to thecenter of shaft 15. In this position cam 23comes in contact with said arm sooner and stays in contact with said armlonger keeping points 13 and 19 separated longer which in turn keeps thecurrent off longer. As bolt 12 is screwed downward the reverse actiontakes place kee in the current on longer, as wil be note r; t is has thesame effect as turning a gas or oil fire u p or down. The arm hasoscillatory movement, as stated by reason of the fact that it is mountedon the pivot at one end and as the said arm oscillates, it carries thehousing and the terminal 17.

The construction of the bracket or support for the fixed control orelectrode is Well shown in Figure 3 and it will be observed that thedevice eanbe installed in machines at comparatively low expense owing tothe fact that the device contains few parts.

I claim:

1. A device of the class described including fixed and movabletransversely disposed electrodes or contacts, insulated meal' forsupporting the fixed electrode or contact, an insulating arm or memberdisposed 101.gitudinally carrying the movable electrode or contact andcomprising a pivoted bracket, insulating strips fitted together andsecured to the bracket and exterior metallic strips backing theinsultating strips and also secured to the said bracket, means forurging the arm or member in one direction and a shaft provided with ecawlated; intermediate ofthe ends of thearm and arranged to engage oneof the metallic strips for positivel moving the erm er member in theopposl e directlon. Y'

2. A device of the class described, including a pivoted bracket, aninsulating arm or member secured to the bracket and comprisin a pluralitof strips of insulat material and bac 'n stps of metal, an interiorlythreaded s ve piercing Ytheinsulatin strips and carried y the said Aarmor mem r, an adjustable screw mounted Yin the threaded sleeve andprovided with a contact or electrode, a xe Contact or elef trodearranged tobeen a bythe said contact or electrode, insu ating means forsupporting the fired contact or electrode and means for moving the armor member to carry the movable contact or electrode into and out of engement with'the fixed con; tact or electrogea.

` 3. A device of the class described inclini a @Porting i and insulatingthe fixed contact or electrode i and for connecting a conductortherewith and means for operating the pivoted mm to engage theelectrodes or contacts with each other and to separate the same.

CLARENCE E. SILVER.

